MESON Chess Problem Database

Problem Display
PID: 185358 (1B1Q2bb/pN6/B2p4/Rn3P2/1rNk2K1/1PRrpP2/1P2p3/8 w - - 0 1)

Lepage, Roger

1st Comm., diagrammes 01. Beginners' Ty., 1974

1B1Q2bb/pN6/B2p4/Rn3P2/1rNk2K1/1PRrpP2/1P2p3/8

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qxd6#
    • 1...Bd5
      • 2.Qxh8#
  • Tries
    • 1.Bxa7+?
      • 1...Kd5
        • 2.Qxd6#
      • 1...Sxa7!
    • 1.Qb6+?
      • 1...Kd5
        • 2.Qxd6#
      • 1...axb6!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qxd6#
      • 1...Bxf6!
    • 1.Qxd6+?
      • 1...Bd5
        • 2.Qc5#
      • 1...Sxd6!
  • Keys
    • 1.Scxd6!
      • threat
        • 2.Sxb5#
      • 1...Kd5+
        • 2.Se4#
      • 1...Ke5+
        • 2.Sc4#
      • 1...Sxc3
        • 2.Sb5#
      • 1...Sxd6
        • 2.Rxd3#
      • 1...Bd5
        • 2.Qxh8#
      • 1...Sa3
        • 2.Sb5#
        • 2.Sf7#
        • 2.Rxd3#
      • 1...Sc7
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT,P_PINS(E),P_SPINS(f)::QAR1(L),XP(g)
    • B(i);N_SPINP(g),OGATE,SBLOCK::QAB(L),XB(j)
  • Tries
    • Try
      • B(K);CHECK,XP(h)
      • Vars
        • K(e);P-FLIGHT,P_PINS(E),P_SPINS(f)::QAR1(L),XP(g)
      • Refutation
        • S(f);XB(K)
    • Try
      • Q(L);CHECK,N_PINP(g)
      • Vars
        • K(e);P-FLIGHT,P_PINS(E),P_SPINS(f)::QAR1(L),XP(g)
      • Refutation
        • P(h);XQ(L)
    • Try
      • Q(L);CHECK,N_PINP(g)
      • Vars
        • K(e);P-FLIGHT,P_PINS(E),P_SPINS(f)::QAR1(L),XP(g)
      • Refutation
        • B(j);XQ(L)
    • Try
      • Q(L);CHECK,XP(g)
      • Vars
        • B(i);P_SPINB(i)::QAB1(L)
      • Refutation
        • S(f);XQ(L)
  • Actual
    • S(E);XP(g)
    • Threat
      • QAR(L)+S(E),DCHECK,XS(f)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINS(f)::QAR(L)+S(E)
      • K(e);CHECK,P_SPINS(f),S_FLIGHT::B(K)+S(E),DCHECK
      • S(f);XR(C)::QAR(L)+S(E),DCHECK
      • S(f);P_SPINS(f),XS(E)::R1(C),XR(b)
      • B(i);OGATE,SBLOCK::QAB(L),XB(j)
      • S(f);::R1(C),XR(b)
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